The Headset-Microphone, cataloged under National Stock Number 5965-01-549-9943, is classified within Federal Supply Class 5965 (Headsets, Handsets, Microphones and Speakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Bosch Security Systems, Inc Dba R T S Systems Div Bosch Security Systems, Inc.. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5965-01-549-9943 |
| Primary Part Number | PH-44R |
| Item Name | Headset-Microphone |
| FSC / FSG | 5965 / 59 — Headsets, Handsets, Microphones and Speakers |
| Manufacturer | Bosch Security Systems, Inc Dba R T S Systems Div Bosch Security Systems, Inc. |
| Status | ACTIVE |
| Microphone Element Type | DYNAMIC |
| Mounting Method | SUSPENDED ON ADJUSTABLE HEADBAND EARPHONE |
| Microphone Mounting Facility | ADAPTER FASTENED TO LEFT EARPHONE |
| Earphone Quantity | 2 |
| Connector to Junction Cord Length | 6.000 FEET FT |
| Impedance Rating | 200.0 OHMS NOMINAL |
| Earphone Element Type | DYNAMIC |
| Frequency Rating | 300.0 HERTZ NOMINAL |
| Earphone Impedance Rating | 150.0 OHMS NOMINAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PH-44R PRIMARY | Bosch Security Systems, Inc Dba R T S Systems Div Bosch Security Systems, Inc. (USA) |
| 300853-401 | Inveris Training Solutions, Inc (USA) |
NSN 5965-01-549-9943 is a Headset-Microphone, manufactured by Bosch Security Systems, Inc Dba R T S Systems Div Bosch Security Systems, Inc., classified under FSC 5965, Headsets, Handsets, Microphones and Speakers. Status: active.
NSN 5965-01-549-9943 has 2 manufacturer part numbers on file: PH-44R (Bosch Security Systems, Inc Dba R T S Systems Div Bosch Security Systems, Inc.), 300853-401 (Inveris Training Solutions, Inc).
Key specifications for PH-44R: Microphone Element Type: DYNAMIC; Mounting Method: SUSPENDED ON ADJUSTABLE HEADBAND EARPHONE; Microphone Mounting Facility: ADAPTER FASTENED TO LEFT EARPHONE; Earphone Quantity: 2. 9 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.